phillip mudd, a former cia and fbi counterterrorism official, says there's a huge concern over who to trust with chemical weapons. >> when you've got roughly 10% of the opposition in the. >>>s u.s. government is declaring are terrorist group you're going to be concerned. in any case like this, there's a lot of risk. >> reporter: but mudd says it's still better to train the rebels on how to handle those materials than to do nothing. and leonard specter says the u.s. and its allies are likely screening the individuals who are being trained very carefully, wofrl, at least that's the hope. >> despite all that, there's still a potential for these chemical weapons getting into the wrong hands. despite what the u.s. is trying to do. >> reporter: phillip mudd says if the syrian regime loses control of these weapons, that's a huge worry. if they fall into the hands of others who are not trusted by the u.s. or its allies they could float around the border to iraq or other potentially dangerous places where they don't have control over these things. if assad loses control of these things anytime